Sofa



FIG. 1 is a front perspective view of a sofa showing my new design;

FIG. 2 is a front and side perspective view thereof;

FIG. 3 is a an opposite front and side perspective view thereof;

FIG. 4 is a side perspective view thereof;

FIG. 5 is rear perspective view thereof;

FIG. 6 is a side perspective view thereof, opposite that of FIG. 4; and,

FIGS. 7 & 8 are other rear perspective views thereof.

I claim, the ornamental design for a sofa, as shown and described.